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Code of Practice for the Reduction of VOC Emissions from the Use of Cutback and Emulsified Asphalt
3 Interpretation
3.1 Definitions
The following definitions apply to this Code:
- Asphalt cement
- the refined residue from the distillation process of selected crude oils, free of water and foreign material, containing less than 1% ash and specially prepared as to quality and consistency for direct use in the manufacture of bituminous pavements.
- Cutback asphalt
- manufactured by blending asphalt cement with a petroleum solvent. There are three major types of cutback asphalt based on the relative rate of evaporation of the solvent: rapid-curing, medium-curing and slow-curing.
- Emulsified asphalt
- a mixture of asphalt cement, water and an emulsifying agent. There are two major categories of emulsified asphalt: cationic and anionic. Anionic emulsions have negatively charged asphalt droplets and cationic emulsions have positively charged asphalt droplets. Certain grades of emulsified asphalt contain added petroleum diluent, which permits a thicker film to adhere to the aggregate and promotes stronger bonding of the asphalt to the aggregate.
- Ozone season
- The ground-level ozone season occurs during the warm-season months, when the days are warmer and longer. The period of May 1 through September 30 is considered the ground-level ozone season in Canada, as defined in the Ozone Annex (2000) of the Canada–United States Air Quality Agreement (1991).
- The Minister
- refers to the federal Minister of the Environment (Environment Canada).
- Volatile organic compounds (VOC)
- has the meaning of Item 65 on the List of Toxic Substances in Schedule 1 of the Canadian Environmental Protection Act, 1999 (CEPA 1999).
3.2 Applicability of the Code
Recommendations in the Code propose standards and control actions aimed at the environmental management of cutback and emulsified asphalt in order to reduce VOC emissions.
This Code does not replace nor supersede any laws or regulations adopted by federal, provincial, territorial, municipal or Aboriginal authorities. Nor does this preclude management of asphalt or asphalt products for other possible toxics substances, or new substances added to the List of Toxics Substances in Schedule 1 of CEPA 1999.
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